So i was installing the needwwings intake and saw this tube just hangin near the firewall at the back of the engine, should this be plugged in somewhere?

 

Can you take a shot from further away too.
I also have a Needswings intake and didn't notice this.
Can't be sure where it is exactly with the close up shot.

 

its right at the rear of engine at the firewall, if you look close behind to where the intake connects you can see it hanging, looks like to be drain possibly.

 

I'll take a look and let you know shortly.

 

Mine is connected to the firewall too but just hanging above the bell housing of the trans.
I imagine it is a drain for water off the windshield and the wiper area.
I guess to determine this just pour some water on the windshield and see if it drains out of the black rubber tube.
It is not connected to anything on my 04 either.
Note: good observation as I didn't even notice it when I installed my CAI.

PS ...
There have been problems with the na Crossfires getting a check engine light (CEL) after installing the Needswings CAI.
It may not happen right away but it has occurred on 5 Crossfires now.
There have also been issues with rough idling.
Rob is aware and has been trying to determine the cause.
He is keeping us up to date here

 

iS IT THE CRANK CASE BREATHER LINE?
enjoy the ride
Mike

 

If I had to guess, the AC drain is most likely

 

It is not connected to the engine at all.
It is below the deck where the wiper blades are below the windshield.

 

It is the A/C drain.

 

Valkryderguy is correct, it's nothing more than a drain tube.. If you look close, directly above the center of the transmission, there's also a gray "star" shaped tube that is also a drain.